123212011313 has 4 divisors (see below), whose sum is σ = 123213080100. Its totient is φ = 123210942528.

The previous prime is 123212011301. The next prime is 123212011367. The reversal of 123212011313 is 313110212321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 313110212321 = 19 ⋅16479484859.

It can be written as a sum of positive squares in 2 ways, for example, as 56602595569 + 66609415744 = 237913^2 + 258088^2 .

It is a cyclic number.

It is not a de Polignac number, because 123212011313 - 2⁴ = 123212011297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123212011213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337220 + ... + 600117.

It is an arithmetic number, because the mean of its divisors is an integer number (30803270025).

Almost surely, 2^123212011313 is an apocalyptic number.

It is an amenable number.

123212011313 is a deficient number, since it is larger than the sum of its proper divisors (1068787).

123212011313 is an equidigital number, since it uses as much as digits as its factorization.

123212011313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068786.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123212011313 its reverse (313110212321), we get a palindrome (436322223634).

The spelling of 123212011313 in words is "one hundred twenty-three billion, two hundred twelve million, eleven thousand, three hundred thirteen".